Third-Party Communication Links - GE Mark VIe System Manual

3.7.4.2 MMF Cable, Heavy Duty Outdoor Use
• Multi-mode fiber, 62.5/125 µ core/cladding, 850 nm infrared light
• Four sub-cables with elastomeric jackets and aramid strength members, and armored outer jacket
• Cable construction: flame retardant pressure extruded polyurethane. Armored with 0.155 mm (0.01 in) steel tape, wound
with 2 mm (0.08 in) overlap, and covered with polyethylene outer jacket, 1 to 1.5 mm (0.04 to 0.06 in) thick. Cable
diameter: 13 mm (0.51 in). Cable weight: 174 Kg/km
• Optical Cable Corporation part number: RK920929-A-CST
3.7.4.3 MMF Cable, Indoor Use (Data Highways)
• Multi-mode fiber, 62.5/125 µ core/cladding, 850 nm infrared light
• Twin plastic jacketed cables (Zipcord) for indoor use
• Cable construction: tight-buffered fibers surrounded by aramid strength members with a flexible flame retardant jacket.
Cable dimensions: 2.9 mm (0.11 in) diameter x 5.8 mm (0.23 in) width. Cable weight: 15 Kg/km
• Corning Cable Systems part number: 002K58-31141–24

3.8 Third-party Communication Links

External communication links are available to interface with third-party plant controls or devices. This allows operators to
have access to real-time data, and provides for discrete and analog commands to be passed to the Mark VIe controller. The
Mark VIe control system can be linked to third-parties in several different ways:
• OPC UA direct from the Mark VIe controller (UCSC)
• OPC UA, DA, AE from the WorkstationST server
• Serial or Ethernet Modbus
• Ethernet Modbus Slave direct from the Mark VIe controller to the third-party device (Ethernet to serial converter device
may be used)
• GSM from the WorkstationST server to the DCS.
GEDS Standard Messages (GSM) is a proprietary 100 mbps Ethernet link using TCP/IP. It supports turbine control
commands, Mark VIe control data and alarms, the alarm silence function, logical events, and contact input sequence of events
records with 1 ms resolution. Ethernet GSM has the advantage of tighter system integration.
Attention
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Slave link from the WorkstationST server
When connecting to third-party devices, the security of the networks and the overall
network architecture need to be considered and engineered accordingly. Third-party
links are best connected through a firewall where one is available. Consideration must
be given to redundancy and availability of communication paths.
GEH-6721_Vol_I Mark VIe and Mark VIeS Control Systems Volume I
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